A person walks at 4 k m p h and covers a certain distance. If he walks at 9 k m p h speed, he covers 7 . 5 k m more. How much distance did he actually cover at 4 k m / h ?

Given, the person walks at 4 k m p h Let the time be x h r s We know that, d = s × t , where d is the distance, s is speed, and t is time. Therefore, d = 4 x When person walks at 9 k m p h , time = x h r s Therefore, d 1 = 9 x When the person walks at 9 k m p h , covers 7 . 5 k m more Therefore, d 1 = d + 7 . 5 ⇒ 9 x = 4 x + 7 . 5 ⇒ 9 x - 4 x = 7 . 5 ⇒ 5 x = 7 . 5 ⇒ x = 7 . 5 5 ⇒ x = 1 . 5 h r s So, the time is 1 . 5 h r s Now, d = s × t = 4 × 1 . 5 = 6 k m Hence, distance covered by the person is 6 k m

E M B I B E

Cambridge connection Mathematics>Chapter 15 - Comparing Quantities>Brain Teaser

Prakash Tiwari and Ishita Joshi Solutions for Chapter: Comparing Quantities, Exercise 13: Brain Teaser

Author:Prakash Tiwari & Ishita Joshi

Prakash Tiwari Mathematics Solutions for Exercise - Prakash Tiwari and Ishita Joshi Solutions for Chapter: Comparing Quantities, Exercise 13: Brain Teaser

Attempt the free practice questions on Chapter 15: Comparing Quantities, Exercise 13: Brain Teaser with hints and solutions to strengthen your understanding. Cambridge connection Mathematics solutions are prepared by Experienced Embibe Experts.

Questions from Prakash Tiwari and Ishita Joshi Solutions for Chapter: Comparing Quantities, Exercise 13: Brain Teaser with Hints & Solutions

MEDIUM

7th ICSE

IMPORTANT

Cambridge connection Mathematics>Chapter 15 - Comparing Quantities>Brain Teaser>Q 1

$₹ 36500$ is deposited into a savings account. After $1$ year $4$ months $15$ days, it totals to $₹ 42, 500$ . Calculate the rate of interest for the account.

MEDIUM

7th ICSE

IMPORTANT

Cambridge connection Mathematics>Chapter 15 - Comparing Quantities>Brain Teaser>Q 2

A person walks at $4 k m p h$ and covers a certain distance. If he walks at $= \frac{262800}{21973}$ speed, he covers $7.5 k m$ more. How much distance did he actually cover at $4 k m / h$ ?

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